9. Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today.
A. ore
B. hydrogen
C. oxygen
D. lead
Ancient cyanobacteria released
oxygen , which assisted in creating the atmosphere as we know it today.
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Asked 1/13/2015 10:08:55 PM
Updated 1/14/2015 5:19:54 AM
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